Device and method for measuring permeability coefficient of rock material under action of seepage-stress coupling

Abstract

The invention discloses a device for measuring the permeability coefficient of rock material under the action of seepage-stress coupling, which comprises a triaxial pressure chamber balance system, a permeability coefficient acquisition system and a data acquisition and processing system, wherein the triaxial pressure chamber balance system loads samples axially or laterally through different stress paths; the permeability coefficient acquisition system is connected with the triaxial pressure chamber balance system so as to realize the determination for the quality of penetrating fluid of rock material sample; and the data acquisition and processing system regularly acquires the quality of penetrating fluid of rock material, calculates penetration flow and permeability coefficient, and draws a relationship curve of the permeability coefficient and time, and simultaneously, the data acquisition and processing system also forms a data format of the quality, the penetration flow and the permeability coefficient for storage and display. Such a measurement device can measure the permeability coefficient, as time and stress change, under different stress loading paths, has simple operation and reliable result, and can display the result visually. The invention also discloses a measurement method adopting the measurement device.

Description

technical field [0001] The invention relates to a device and method for detecting the permeability of rock materials under complex stress conditions, in particular to a visualization device and method for measuring the permeability coefficient of rock materials under the coupled action of seepage-stress, which is suitable for major hydropower, bridges , Water-mechanical coupling of materials in road engineering, research and measurement of permeability coefficient under the action of gas-mechanical coupling for underground storage of petroleum and nuclear fertilizer treatment. Background technique [0002] The permeability of rock materials refers to the ability of rock pores and fractures to penetrate under the action of fluid or gas. The physical meaning of permeability coefficient is the permeability of rock materials to a specific fluid. During its long formation process, rocks are rich in various defects, including macroscopic discontinuities such as microcracks, pores,...

AI Technical Summary

Problems solved by technology

[0005] On the basis of referring to domestic and foreign materials, it can be seen that the original permeability coefficient testing technology has defects such as inability to consider different stress paths, uncontrollable temperature, poor sealing of the test device, and complete manual data processing. Combining the permeability detection technology of rock materials under stress conditions with electronic visualization technology, a device and method for automatic collection and processing of electronic visualization data of rock material permeability coefficients under the seepage-stress coupling action are invented, which can output data and curves at the same time. Improve the efficiency and accuracy of data processing, making it more intuitive, this technology is the first at home and abroad

Images